Cervical Collar Clearance in Patients with Osteoporosis or Rheumatoid Arthritis

Imaging Requirements for Clearance

The American College of Radiology recommends that a high-quality CT scan with axial slice thickness <3mm and sagittal and coronal reconstructions is sufficient for cervical spine clearance in patients with osteoporosis or rheumatoid arthritis, with a sensitivity of 98.5% for detecting clinically significant cervical spine injuries 1, 2
Directed CT of C1-C2 and C7-T1 junctions is critical, as these areas detect fractures in an additional 10% of patients who had normal plain films 3
Plain radiographs are inadequate and dangerous, missing approximately 15% of cervical injuries, with a functional sensitivity of only 89.4% even when adequate 4, 3

Patients with osteoporosis or rheumatoid arthritis do not require different clearance criteria than other trauma patients, but warrant heightened clinical suspicion, with the negative predictive value of a normal, high-quality CT being 99.9% 1, 2, 4

The American College of Radiology recommends that MRI is not routinely required for cervical spine clearance in obtunded patients with negative CT, even in high-risk populations, as it identifies soft-tissue injuries in 5-24% of patients, but <1% of these represent unstable injuries requiring treatment 1, 2
MRI should be reserved for patients with neurologic deficits unexplained by CT findings or clinical concern for cord compression 1, 2

Prolonged collar use beyond 48-72 hours often exceeds the risks of missed cervical spine injury, with complications including pressure sores, increased intracranial pressure, ventilator-associated pneumonia, delirium, failed enteral nutrition, and thromboembolic events 5, 3, 6

The American Society of Anesthesiologists recommends removing at least the anterior portion of the collar during intubation attempts to improve glottic exposure and reduce difficult intubation rates, and using videolaryngoscopy rather than direct laryngoscopy when possible 7, 6

The American College of Radiology recommends not relying on plain radiographs alone, as they miss 15% of injuries and have inadequate sensitivity, and not obtaining flexion-extension views, as they are often inadequate and rarely demonstrate instability not identified on CT 4, 3, 2